Territory



T (No Model.)

P. J. JOHNSON 8v J. H. HAMILL. CALENDAR ATTACHMENT FOR TIMEPIEGES.

Patented Aug. 30, 1892.

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IN VE/V TORJ.

WITNESSES.-

BY M

ATTORNEYS.

UNITED STATES PATENT OEEIcE.

PAUL J. JOHNSON AND JOSEPH H. HAMILL, OF GLOBE, ARIZONA TERRITORY.

CALENDAR ATTACHMENT FOR TIMEPIECES.

SPECIFICATION forming part of Letters Patent No. 481 ,7 93, dated August 30, 1892.

Application filed November 16 1891- Serial No. 412,101 (No model) To aZZ whom it may concern.-

Be it known that we, PAUL J. JOHNSON and JOSEPH H. HAMILL, of Globe, in the county of Gila and Territory of Arizona, have invented a new and Improved Oalendar Attachment for latches and Clocks, of which the following is a specification, reference being had to the annexed drawings, forming a part thereof, in Which- Figure 1 is a front elevation of a watch to which our improvement has been applied. Fig. 2 is an enlarged detail view of the calendar attachment. Fig. 3 is a diametrical sec tion taken on line 3 3 in Fig. 2. Fig. 4 is an enlarged detail View of the plate which supports the calendar-disk. Fig. 5 is a front clevation of the spring-washer. Fig. 6 is a transverse section taken on line 5 5 in Fig. 5. Fig. 7 is an enlarged front elevation of the hour-hand, showing the operation of the calendar-operating finger; and Fig. 8 is a detail view of the calendar-operating finger.

Similar letters of reference indicate corre sponding parts in all the views.

The object of our invention is to construct a simple and efficient calendar attachment for watches and clocks which may be readily applied to timepieces already in use.

Our invention consists in a metallic disk furnished with a pointer extending from the edge thereof and provided with a central boss, a graduated disk mounted on the boss and furnished with divisions corresponding with the days of the month and having a notched periphery, and a finger provided with curved spring-arms mounted on the boss of the hourhand and adapted to engage the notched periphery of the disk, all as will be hereinafter more fully described.

The disk A, forming the fixed portion of our attachment, is made of metal or other suitable material, with a pointed arm B extending from the edge thereof and bent over or returned parallel with itself, with the point of the arm extending within the periphery of the disk. The center of the disk is furnished with a boss at for receiving the disk 0, which is held in place on the boss by a springwasher 12, secured to the boss by the screw 0, passing through the washer and entering the center of the boss.

The disk O is made of material such as will harmonize with the watch or clock dialsuch, for example, as enameled metal, ivory, or celluloid.

The disk 0 is provided on itsface near its periphery with thirty-one equidistant radial lines,which are numbered froml to 3l,representing the days of the month, and the periphery of the disk is provided with sixty-two notches d.

On the boss of the hour-hand D is placed a curved spring E, provided with a finger c.

The disk A is secured to the dial F of the timepiece by means of any suitable cementin such a position relative to the hour-hand boss as to enable the finger 6, carried by the hourhand, to enter the notches of the disk O and carry it forward one notch for each revolution, so that when the hour-hand moves the calendar-disk 0 two notches it carries the disk forward a distance representing one day and brings a new figure opposite the pointed end of the arm B. The disk O can be set at any time when the finger e is not in engagement with its notched periphery. If the timepiece runs regularly, the said disk requires setting only once a month.

Having thus described our invention, we claim as new and desire to secure by Letters Patent 1. A calendar attachment for watches and clocks, consisting of a base-plate provided with a pointer and adapted to be secured to a dial, a notched and graduated disk mounted to turn on the base-plate, and a spring adapted to be secured to the boss of the hourhand and provided with a finger to engage the notched disk, substantially as described.

2. In a calendar attachment for watches and clocks, the combination, with a base-plate adapted to be secured. to a dial and provided with a central boss and an inwardly-proj ecting finger, of a graduated disk having a central aperture to receive the said boss and a notched periphery, a screw and washer for holding the graduated disk on the boss of the base-plate, and a curved spring adapted to be secured to the boss of the hour-hand and provided with a finger to engage the notches of the graduated disk, substantially as herein shown and described.

PAHL J. JOHNSON. JOSEPH H. HAMILL.

Witnesses AL. SIEBER, thus. '1. MARTIN. 

